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Commitments and Contingencies (Tables)
 3 Months Ended
Feb. 28, 2018
Commitments and Contingencies Disclosure [Abstract]  
Changes in the Warranty Liability
The changes in our warranty liability were as follows (in thousands):
 
 
Three Months Ended February 28,
 
 
2018
 
2017
Balance at beginning of period
 
$
69,798

 
$
56,682

Warranties issued
 
7,764

 
7,140

Payments
 
(5,717
)
 
(6,112
)
Balance at end of period
 
$
71,845

 
$
57,710
Schedule of Self-Insurance Liability
The changes in our self-insurance liability were as follows (in thousands):
 
 
Three Months Ended February 28,
 
 
2018
 
2017
Balance at beginning of period
 
$
177,695

 
$
158,584

Self-insurance expense (a)
 
4,401

 
4,640

Payments 
 
(1,365
)
 
(2,040
)
Adjustments (b)
 
(36
)
 
(1,302
)
Balance at end of period
 
$
180,695

 
$
159,882

(a)
These expenses are included in selling, general and administrative expenses and are largely offset by contributions from subcontractors participating in the wrap-up policy.
(b)
The amount for each period reflects changes in our self-insurance liability that were offset by changes in the receivable for estimated probable insurance and other recoveries to present our self-insurance liability on a gross basis.